[Koha] Search record not found

I am currently having a problem with two records. The records are entered correctly and can be found by performing keywords search. The problem is when the complete title is entered example " Trinidad and Tobago : terrific and tranquil " the record is not found. Removing the space on any side of the colon, takes you directly to the record. This is our OPAC http://www.library.dlis.gov.dm/ I have re-entered the record with the same result and have also performed a manual zebra rebuild. Any tips or advice would greatly be appreciated. Thank you -- Dominica Library and Information Service Tel. #: 1-767-266-3341/3355 Email: publiclibrarysdi@gmail.com URL: http://www.dlis.gov.dm